Member of the Trade: bhobuds.com

well I see some huge blocks reserved above so I'll start off for now with brief overview of things soon to manifest for mine.
All parts ordered and waiting to show up, only a few to grab locally.
Everything is in tentative plans only stage so far until it all shows up and actually works/fits in the finished builds, ironed out and trouble free.

Volume potentiometer replacement:

Member T.R.A.N.C.E. pointed out my mistake in thinking they were 100K for some reason.
These are 10k values stock.

Audio Note 100k ohm model 81914.

I thought I'd try one to see how it reacted. These are hand built.

ALPS-68580 Blue Velvet 10k ohm

Will use some stock to be able to keep the on/off function intact for trial builds.

^ the Audio Note and the ALPS do not have the built in switching ( ON/OFF ) sections, and only control the channel volumes.
There should be two points on the circuit traces where those ON/OFF stock volume pot legs would gets soldered into, but will be empty when replacing with the others.
I will use connection wiring soldered to those two trace points and route them to a front mounted mini slider switch or micro metal toggle.
This will require always checking to see the volume is turned right down each time I turn it on.

It keeps the PCB front to rear distance the same ( 80mm ) so the inputs/outputs require no extending and are easy to make holes for in whatever faceplates used,but adds ~9mm extra height and ~24mm width.

Capacitor Fun:
For dedicated themed units

* the small 10uf apparently have tiny legs so will have to see how a larger set fits.

New Old Stock Soviet caps:
Most electronics back then were manufactured in Military factories, obviously the best went to that, and rest were likely sorted accordingly after.
No real way to tell.
No idea how well they have held up for tolerances by now so some values may be tried in a larger value or some other models may be sourced.

For the following they will use other brand power filter caps to hopefully fit, anything above 10mm wide seems to cause case-fit problems in it's position and most 1000uf audio caps are above that.Another member might chime in on audio vs low esr ones...

Member of the Trade: bhobuds.com

Headphoneus Supremus

Joined:
Feb 3, 2011

Posts:
4,893

Likes: 804

well I see some huge blocks reserved above so I'll start off for now with brief overview of things soon to manifest for mine.
All parts ordered and waiting to show up, only a few to grab locally.
Everything is in tentative plans only stage so far until it all shows up and actually works/fits in the finished builds, ironed out and trouble free.

Volume potentiometer replacement:

Member T.R.A.N.C.E. pointed out my mistake in thinking they were 100K for some reason.
These are 10k values stock.

Audio Note 100k ohm model 81914.

I thought I'd try one to see how it reacted. These are hand built.

ALPS-68580 Blue Velvet 10k ohm

Will use some stock to be able to keep the on/off function intact for trial builds.

^ the Audio Note and the ALPS do not have the built in switching ( ON/OFF ) sections, and only control the channel volumes.
There should be two points on the circuit traces where those ON/OFF stock volume pot legs would gets soldered into, but will be empty when replacing with the others.
I will use connection wiring soldered to those two trace points and route them to a front mounted mini slider switch or micro metal toggle.
This will require always checking to see the volume is turned right down each time I turn it on.

It keeps the PCB front to rear distance the same ( 80mm ) so the inputs/outputs require no extending and are easy to make holes for in whatever faceplates used,but adds ~9mm extra height and ~24mm width.

Capacitor Fun:
For dedicated themed units

* the small 10uf apparently have tiny legs so will have to see how a larger set fits.

New Old Stock Soviet caps:
Most electronics back then were manufactured in Military factories, obviously the best went to that, and rest were likely sorted accordingly after.
No real way to tell.
No idea how well they have held up for tolerances by now so some values may be tried in a larger value or some other models may be sourced.

For the following they will use other brand power filter caps to hopefully fit, anything above 10mm wide seems to cause case-fit problems in it's position and most 1000uf audio caps are above that.Another member might chime in on audio vs low esr ones...

Member of the Trade: bhobuds.com

Joined:
Aug 14, 2006

Posts:
8,365

Likes: 2,404

I was thinking about adding a digital output to the desktop Walnut I make in the future. I am wondering if I can take a digital signal straight from the SOC or if more would need to be added. At the least, I'm going to use RCA/XLR outputs on it

500+ Head-Fier

Joined:
Mar 12, 2016

Posts:
507

Likes: 207

I'm looking to do some moding in my local hackerspace but total noob on this interested in a trying out new opamp but also new potentiometer (alps?). How do you guys made the switch for on/off function? what op amp do you suggest? some people seems to agree on JRC NE5532 in the other thread.